Title :
4-port Microstrip Ferrite Coupled-Line Circulator
Author :
Queck, Cham Kiong ; Davis, Lionel E.
Author_Institution :
Microwave Engineering Group, University of Manchester Institute of Science and Technology, PO Box 88, Manchester M60 1QD. Tel: 0161-2004757 Fax: 0161-2008712, Email: mchpicq2@fs2.ee.umist.ac.uk
Abstract :
A 4-port microstrip Ferrite Coupled-Line (FCL) circulator is designed at 11.4 GHz by cascading a longitudinally-magnetized FCL structure with a 180° hybrid coupler. A broadband 180° hybrid ring with a bandwidth of approximately 7 GHz is realised by employing stepped impedance sections on the hybrid coupler. The simulated results of the respective sections are presented in this paper. The scattering matrix of the cascaded 4-port microstrip FCL circulator is predicted using a power flow diagram.
Keywords :
Bandwidth; Conductivity; Ferrites; Frequency; Impedance; Magnetization; Microstrip; Scattering; Strips; Transmission line matrix methods;
Conference_Titel :
Microwave Conference, 2001. 31st European
Conference_Location :
London, England
DOI :
10.1109/EUMA.2001.339072
